Rapid extrapolation of high-temperature low-cycle fatigue curves for a nickel superalloy

Abstract

In many industrial applications, ranging from the energy, the aviation to the microelectronics field, metallic alloys are subjected to fatigue load at elevated temperatures. The detrimental influence of temperature and creep deformation damage on the structural performance of such components has for several decades posed a serious challenge to the work of scientists and engineers, and the methods developed to account for creep fatigue interaction require extensive testing and work for being calibrated and implemented. In the present letter, the authors propose a quick iterative procedure to translate the fatigue curve of an alloy in order to consider the reduction of resistance caused by creep damage. The method is validated against high-temperature fatigue results for the Haynes 230 commercial nickel superalloy showing promising results.